But in the context, it wasn't actually racist. It is not racist to suggest that cocaine usage makes an individual more courageous, and given that the accepted (and still accepted) saying for inebriation-related courage is Dutch courage, it wasn't racist to say that cocaine gave shy individuals dutch courage. Perhaps the expression has its origins in racism, but centuries later and without that original context, I'd argue that its no longer a racist expression.

It was of course racist for Dr Ed to suggest that somehow the issue was only with black people, but that's unrelated to the use of the expression dutch courage.